/*
 * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
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 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.corba.se.impl.naming.pcosnaming;

import java.io.Serializable;
import org.omg.CosNaming.NameComponent;


/**
 * Class InternalBindingKey implements the necessary wrapper code
 * around the org.omg.CosNaming::NameComponent class to implement the proper
 * equals() method and the hashCode() method for use in a hash table.
 * It computes the hashCode once and stores it, and also precomputes
 * the lengths of the id and kind strings for faster comparison.
 */
public class InternalBindingKey
    implements Serializable {

  // computed by serialver tool
  private static final long serialVersionUID = -5410796631793704055L;

  public String id;
  public String kind;

  // Default Constructor
  public InternalBindingKey() {
  }

  // Normal constructor
  public InternalBindingKey(NameComponent n) {
    setup(n);
  }

  // Setup the object
  protected void setup(NameComponent n) {
    this.id = n.id;
    this.kind = n.kind;
  }

  // Compare the keys by comparing name's id and kind
  public boolean equals(java.lang.Object o) {
    if (o == null) {
      return false;
    }
    if (o instanceof InternalBindingKey) {
      InternalBindingKey that = (InternalBindingKey) o;
      if (this.id != null && that.id != null) {
        if (this.id.length() != that.id.length()) {
          return false;
        }
        // If id is set is must be equal
        if (this.id.length() > 0 && this.id.equals(that.id) == false) {
          return false;
        }
      } else {
        // If One is Null and the other is not then it's a mismatch
        // So, return false
        if ((this.id == null && that.id != null)
            || (this.id != null && that.id == null)) {
          return false;
        }
      }
      if (this.kind != null && that.kind != null) {
        if (this.kind.length() != that.kind.length()) {
          return false;
        }
        // If kind is set it must be equal
        if (this.kind.length() > 0 && this.kind.equals(that.kind) == false) {
          return false;
        }
      } else {
        // If One is Null and the other is not then it's a mismatch
        // So, return false
        if ((this.kind == null && that.kind != null)
            || (this.kind != null && that.kind == null)) {
          return false;
        }
      }
      // We have checked all the possibilities, so return true
      return true;
    } else {
      return false;
    }
  }


  // Return precomputed value
  public int hashCode() {
    int hashVal = 0;
    if (this.id.length() > 0) {
      hashVal += this.id.hashCode();
    }
    if (this.kind.length() > 0) {
      hashVal += this.kind.hashCode();
    }
    return hashVal;
  }
}
